Multi-instrument examination of the response in the thermosphere and ionosphere to a planetary wave observed in the middle atmosphere
The ionosphere displays variations on the time-scales of atmospheric planetary waves, and predicting these is necessary for any reliable forecast of the ionosphere. Observation and modeling of the upward propagation of planetary waves through to the upper mesosphere is well documented, but there are comparatively few observations of these waves at higher altitudes. Additionally, there have been several mechanisms proposed that explain how these signatures are seen in the F-region ionosphere, including communication by proxies (tides, gravity waves), electrodynamic forcing and compositional changes. This study utilizes a variety of data sources, including observations from ICON of planetary waves and their impacts at ionospheric altitudes to provide constraints on the mechanisms involved. Results from both atmospheric and ionospheric impacts will be presented.